In this document, Food Safety Expert, Barry E. Parsons, FMP, CP-FS, CCFS provides introductory information on Listeria, including symptoms, notable outbreaks, and what food service establishments should be doing to prevent outbreaks. PREVALENCE  Approximately 1,600 illnesses and 260 deaths are attributed to listeriosis, from Listeria Monocytogenes (LM), in the United States each year. A large ...